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Martina Hingis (born 30 September 1980 in Košice, Slovakia, then Czechoslovakia) is a retired Swiss professional tennis player who spent a total of 209 weeks as World No. 1. She is known as the "Swiss Miss". She has won five Grand Slam singles titles, three at the Australian Open (1997 to 1999), one at Wimbledon (1997) and one at the U.S. Open (1997). She was also a dominant player in doubles, winning nine Grand Slam doubles titles.
Hingis has retired twice from the game. The first time was in 2002, when she was struggling with injuries and was only 22. She returned to tennis in 2005, but retired two years later after sustaining more injuries. A blood test had also proved that she was using cocaine, an illegal drug.
She was a contestant in the 2009 series of Strictly Come Dancing.